RU2148692C1 - Suction device of suction-tube dredger - Google Patents

Abstract

FIELD: hydraulic engineering. SUBSTANCE: device can be used in development of placer deposits of minerals of high density in underwater work faces. Suction device of suction-tube dredger has head-piece with circular screen which contains disk located at mouth level. Radial slots are also provided. Circular screen is made with shoulder which is located below external part of disk. Radial slots are created by sectors with stiffening ribs which are connected with disk and shoulder. Aforesaid embodiment of suction device is aimed at enhancing efficiency of extracting heavy mineral components from underwater placer deposits. EFFECT: higher efficiency. 3 dwg

Description

 The invention relates to the field of hydromechanization and can be used in the development of placer mineral deposits of high density in underwater faces.

 Known suction device dredging projectile, including a suction tip, on which an annular screen is pivotally mounted [1].

 The disadvantage of this device is the design complexity, the possibility of freezing at a certain height due to distortions and jamming of the supports, as well as the significant energy consumption of the process due to imperfect hydraulic suction conditions.

 Known tip of the suction pipe of a dredger with an annular screen, including an annular screen located at the level of the mouth of the tip [2].

 The disadvantage of this design is that the proposed screen does not provide the least hydraulic resistance during movement of the hydraulic mixture and therefore requires increased energy consumption.

 Known suction device dredging projectile, including a suction tip, a hydraulic collector collector with a nozzle and a screen that reflects the suction zone [3].

 The disadvantage of this device is the limited erosion zone of the placer.

 Closest to the technical nature of the proposed is the suction device of the dredger, including a suction tip with a flexible annular screen located at the level of the mouth [4].

 The disadvantage of this device is the heterogeneity of the study of the working zone of the face and, therefore, the possible loss of valuable components of the placer.

 The aim of the invention is to increase the efficiency of extraction of heavy useful components from underwater placers.

 This goal is achieved by the fact that in the suction device of the dredger, including the suction tip with an annular screen containing a disk located at the level of the mouth and radial grooves, the annular screen is provided with a shoulder installed below the outer part of the disk, and the radial grooves are formed by sectors with stiffeners connected with a disk and a shoulder, while the disk is made hard.

 The execution of the annular screen hollow, having a solid disk with a shoulder at the top, radial grooves on the suction side, ensures the emergence of ascending jets not only under the suction tip, but also under the entire screen. Due to the fact that the upward flow has a greater weighing ability than the horizontal flow, the involvement of heavy particles in the hydraulic mixture increases significantly, which improves the efficiency of absorption of heavy useful components from underwater placers.

 The proposed device dredger with a screen shown in the drawings.

 In FIG. 1 shows a view of a suction device of a dredger; in FIG. 2 is a view A in FIG. 1; in FIG. 3 is a view B in FIG. 2.

 The suction device of the dredger comprises a suction tip 1 and an annular screen 2, including a disk 3 located at the level of the mouth 4 of the suction tip 1, and radial grooves 5. The annular screen 2 is provided with a collar 6 mounted below the outer part 7 of the disk 3, and the radial grooves 5 are formed sectors 8 with stiffening ribs 9 associated with the disk 3 and the shoulder 6. In this case, the disk 3 is made rigidly. The suction tip 1 is connected to the suction pipe 10 of the dredger.

 The device operates as follows.

 With the suction tip 1 immersed in water, a dredger (not shown) is turned on. The vacuum from the suction tip 1 extends to the entire cavity of the annular screen 2, as a result of which under the radial grooves 5 there are ascending flows of water that lift up both waste rock particles and heavy particles of useful components. The hydraulic mixture formed under the annular screen 2 enters through the radial grooves 5 into the suction tip 1. The burt 6, which is installed at the bottom of the outer part 7 of the disk 3, located at the level of the mouth 4 of the suction tip 1, prevents the flow of clean water and thus contributes to the efficiency of the process. The stiffening ribs 9, in addition to the function of connecting the disk 3 with sectors 8, prevent intensive mixing of the hydraulic mixture inside the annular screen 2 and therefore reduce hydraulic resistance, and hence the cost of power. The suction tip 1 is connected to the suction pipe 10 of the dredger.

 Using the proposed device can improve the efficiency of extraction of heavy useful components from underwater placers.

Sources of information:
1. A. p. USSR N 227196, IPC E 02 F 3/92, "Dredger Dredger", publ. 01/28/69, Bull. N 29.

 2. A. p. USSR N 899782. IPC E 02 F 3/92, "Tip of the suction pipe of a dredger", publ. 01/23/82, Bull. N 3.

 3. A. p. USSR N 1273455, IPC E 02 F 3/92, "Soil intake device of an dredging projectile", publ. 11/30/86, Bull. N 44.

 4. A. p. USSR N 985203, IPC E 02 F 3/92, "Suction device for an suction dredger," publ. 12/30/82, Bull. N 48 is a prototype.

Claims (1)

 The suction device of the dredger, including a suction tip with an annular screen containing a disk located at the level of the mouth, and radial grooves, characterized in that the annular screen is provided with a shoulder mounted below the outer part of the disk, and the radial grooves are formed by sectors with stiffeners associated with the disk and shoulder, while the disk is made hard.

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